"They have confessed to the killing of the professor," he said. Syed Sibte Jaffar Zaidi was a well-respected college principal and literary figure and was targeted by assailants in the city while returning home on his motorcycle.

His killing led to widespread mourning in the city. Khan said the two arrested men were linked with a splinter group of the LeJ known as the Naeem Bokhari group which worked in alliance with Tehreek-i-Taliban Pakistan (TTP).

"The arrests were made in Surjani Town area and they have also confessed to other killings but we are still confirming the information," he said.
Police also seized a large amount of weapons and explosives from the men. Khan said investigations had revealed that both the militants were also planning to target election campaigns of political parties in the run-up to the general elections in May.
He said there were several splinter groups of militant outfits like the LeJ and TTP operating in Karachi and many senior police and rangers officials were on their hitlist.